MPV046CBAESBBAAAA Hydraulic Piston Pump | Sauer-Danfoss 90 Series Replacement | MPV025 MPV035 MPV044

The MPV Series Axial Piston Variable Pumps (including MPV025, MPV035, MPV044, and MPV046) by Chengyuan Hydraulic are high-performance components engineered specifically for closed-circuit hydrostatic drives. Fully compatible with Sauer-Danfoss (90 Series) technical standards, these pumps offer 100% original-place interchangeability. The MPV046CBAESBBAAAA model features a compact swashplate design with integrated charge pumps and control valves. Through 100% simulated condition testing, we guarantee exceptional flow linearity and mechanical efficiency at peak pressures up to $420\text{ bar}$, making them the premier alternative for mobile machinery drive systems.

Technical Specifications

• Standard Model: MPV046CBAESBBAAAA

• Displacement: $46.5\text{ cm}^3\text{/rev}$

• Rated Operating Pressure: $420\text{ bar (42 MPa / 6090 psi)}$

• Peak Pressure: $450\text{ bar (45 MPa)}$

• Max Operating Speed: $4000\text{ rpm}$

• Charge Pump Displacement: $11\text{ cm}^3\text{/rev}$ (standard)

• Control Type: CBAE (Hydraulic/Electric Proportional Control)

• Rotation Direction: CW (Clockwise) or CCW (Counter-clockwise)

• Net Weight: Approx. $34\text{ kg}$

Key Technical Advantages

• Integrated Closed-Loop Architecture: Features built-in charge pumps and high-pressure relief valves. This integrated design minimizes external plumbing, improves power density, and ensures rapid system response for hydrostatic transmission.

• Bi-Metal Valve Plate Technology: The valve plate surface is engineered using a specialized sintered copper process, enhancing anti-cavitation properties and providing a superior lubrication interface during heavy-load startups to prevent galling.

• Precision Servo Mechanism: The internal servo pistons are ultra-fine ground and paired with a high-rigidity swashplate support. This ensures smooth and accurate displacement adjustments even under frequent reversal or extreme load fluctuations.

• Low-Ripple 9-Piston Design: Utilizing an optimized nine-piston arrangement, this pump significantly reduces output pressure pulsations (ripples), thereby minimizing vibration and structural noise throughout the hydraulic system.

Application Areas

• Construction Machinery: Travel drives for vibratory rollers, skid steer loaders, and asphalt pavers.

• Agricultural Equipment: Hydrostatic transmission for combine harvesters and self-propelled sprayers.

• Material Handling: Drive systems for heavy-duty forklifts and reach stackers.

Expert Maintenance Tips

• Charge Pressure Monitoring: Closed systems are highly sensitive to charge pressure. Ensure charge pressure remains between $18\text{–}24\text{ bar}$ after startup; insufficient charge will lead to catastrophic pump failure.

• Filtration Standard: We recommend $10\mu\text{m}$ high-pressure filtration. Maintain oil cleanliness at ISO 4406 18/16/13 or better to prevent the servo control valves from sticking.

• Casing Priming: Before the initial start, fill the pump casing with clean hydraulic oil through the highest drain port and bleed the air to prevent dry friction damage to the slipper and retainer plate.